Finding the Fourth Proportional to 216,279.50, 298,429.43 and 120,786.57

Step by Step Solution

1. Step 1: Write the proportion equation
   216,279.50 : 298,429.43 = 120,786.57 : x
2. Step 2: Convert to fraction form
   216,279.50/298,429.43 = 120,786.57/x
3. Step 3: Cross multiply
   216,279.50x = 298,429.43 × 120,786.57
4. Step 4: Simplify right side
   216,279.50x = 36,046,266,632.82
5. Step 5: Solve for x
   x = 36,046,266,632.82/216,279.50
6. Step 6: Final answer
   x = 166,665.21